Back to Math Tools in a 1:1 Environment

Introduction

Constructing a Right Triangle

Video Version

1. Open Sketchpad
2. Draw a Segment
3. Select the Segment and ONE Endpoint
4. Go to Construct -> Perpendicular Line
5. Put a Point on the perpendicular line
6. Highlight ONLY the perpendicular line. Go to Display -> Hide Perpendicular Line
7. Use the Segment Tool to create the two missing sides

Quadrilateral Activity

We are now going to work on a project that I give my students to complete by the end of the quadrilaterals unit in Geometry.
File given to students: Quadrilaterals in Sketchpad Project.doc
Your instructions:
Get in groups of 2

1. Using Sketchpad, you must create 4 “dynamic sketches”. These are: parallelogram, rectangle, rhombus, and square. What does this mean?
   • Your construction must always hold the properties of the shape created. For example, if I construct a parallelogram, opposite sides are always parallel. Also, I can manipulate the side lengths and angles (if applicable) by dragging the shape's vertices and/or sides.
   • Hint: The "Construct" and "Transform" tabs will be helpful with different quadrilaterals!
2. Put all 4 sketches in one file, but on different pages. How do you do that?
   • File -> Document options -> Add page -> Blank Page
   • Name each page by the quadrilateral you are creating
   • There are tabs on the bottom left corner that help you go from one page to the other.
   • In document options, also name each page by the shape you are constructing
3. After you have created your dynamic shape, write specifically how you created that shape.
4. You will be sharing with another group in 30 minutes!
5. Check with me before uploading your file to this page.